504 citations · 5.2k across the 62 of their papers we have counts for
62 papers
Radiative GRMHD simulations of puffy accretion discs: Numerical versus analytical models of sub-Eddington accretion
Debora Lančová, Maciek Wielgus, Marek Abramowicz +6
A widely accepted picture of an accretion flow in the luminous soft spectral state of X-ray binary systems is a geometrically thin disc structure much like the classic analytic sol…
Puffy accretion disks: sub-Eddington, optically thick, and stable
Debora Lančová, David Abarca, Włodek Kluźniak +6
We report on a new class of solutions of black hole accretion disks that we have found through three-dimensional, global, radiative magnetohydrodynamic simulations in general relat…
Radiative GRMHD simulations of accretion and outflow in non-magnetized neutron stars and ultraluminous X-ray sources
David Abarca, Włodek Kluźniak, Aleksander Sądowski
We run two GRRMHD simulations of super-Eddington accretion disks around a black hole and a non-magnetized, non-rotating neutron star. The neutron star was modeled using a reflectiv…
Optical and X-ray luminosity of expanding nebulae around ultraluminous X-ray sources
Magdalena Siwek, Aleksander Sadowski, Ramesh Narayan +2
We have performed a set of simulations of expanding, spherically symmetric nebulae inflated by winds from accreting black holes in ultraluminous X-ray sources (ULXs). We implemente…
Evolving Nonthermal Electrons in Simulations of Black Hole Accretion
Andrew Chael, Ramesh Narayan, Aleksander Sadowski
Current simulations of hot accretion flows around black holes assume either a single-temperature gas or, at best, a two-temperature gas with thermal ions and electrons. However, pr…
Optical/UV-to-X-Ray Echoes from the Tidal Disruption Flare ASASSN-14li
Dheeraj R. Pasham, S. Bradley Cenko, Aleksander Sadowski +4
We carried out the first multi-wavelength (optical/UV and X-ray) photometric reverberation mapping of a tidal disruption flare (TDF) ASASSN-14li. We find that its X-ray variations…